117212047 has 4 divisors (see below), whose sum is σ = 117724120. Its totient is φ = 116699976.

The previous prime is 117212027. The next prime is 117212077. The reversal of 117212047 is 740212711.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 117212047 - 2¹¹ = 117209999 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (117212027) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 255693 + ... + 256150.

It is an arithmetic number, because the mean of its divisors is an integer number (29431030).

Almost surely, 2^117212047 is an apocalyptic number.

117212047 is a deficient number, since it is larger than the sum of its proper divisors (512073).

117212047 is an equidigital number, since it uses as much as digits as its factorization.

117212047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512072.

The product of its (nonzero) digits is 784, while the sum is 25.

The square root of 117212047 is about 10826.4512653039. The cubic root of 117212047 is about 489.3926210295.

Adding to 117212047 its reverse (740212711), we get a palindrome (857424758).

The spelling of 117212047 in words is "one hundred seventeen million, two hundred twelve thousand, forty-seven".